AIRCONDITIONING - PRESSURIZATION

the hot air press reg. valve closes and the trim air valves close

the related Pack is lost, and the hot air pressure regulating valve and associated trim air valves closes.

passing air through a skin heat exchanger

only when delta P is less than 1psi

no effect, as the second lane takes over

drives the compressor, cooling air fan and also expands and cools the air.

True

no effect

high

adding hot air

regulates the pressure of hot air, tapped upstream of the packs

pneumatically operated and electrically controlled

the cockpit overhead panel

the cockpit overhead panel

the minimum idle is increased automatically

8000 ft

-1 psi

no

air conditioning system controllers

packs, cabin air, emergency ram air inlet and LP ground connector

automatically and independently of each other

when delta P < 1 psi and the Ditching pb is not selected

Air Conditioning System Controller 1

cockpit, forward and aft cabins

True

air conditioning system controllers

either is correct

cockpit trim air valve or cabin trim air valves fail

120% of normal

120% of normal

pack overheat, engine fire push button released, engine start, ditching pb pressed

the optimized temperature regulation of the corresponding zone is lost

3 - one for the cockpit and two for the cabin

70 kts ( after 20 sec delay )

to the APU ECB

all are correct

transfers automatically to cabin pressure controller 2

fully automatic

one of three electric motors

fully opened

CAB PRESS Page

one controller active, one in standby

N°1

< 1 psi

both are correct

pneumatically

FMGC

False

valve open (more than 95% during flight)

one safety valve is open

> 9, 550 ft

System 2 takes over automatically without crew action

take-off power selection

8.6 psi

FMGS landing field elev, dest. QNH and static pressure information

passing air through a skin heat exchanger

when ∆P < 1 psi and ditching is not selected

the OFV is not fully open + both CPCs fail + a/c on ground + all engines shutdown